Strain and other geophysical data

Geophysical data such as strain, creep, tilt, and water level from
several networks or projects are archived at the NCEDC. Because
the diversity of these experiments is large, they are listed by
network, rather than by data type.

USGS Fault Monitoring Network

The USGS has collected a diverse set of geophysical data over the last 25
years. The low-frequency geophysical data
includes over 1300 channels of strain, creep, magnetic field, tilt,
well water level, differential lake level, electric field, pore pressure and
associated environmental measurements such as rainfall, barometric pressure,
wind speed, snow depth and crustal temperature at various depths.

Berkeley Digital Seismic Network

Most stations of the BDSN include
pressure and temperature sensors, in addition to the seismic channels. The
station BRIB also includes a dilatometer strainmeter. The stations of the
"mini-Plate Boundary Observatory" project,
which is part of the BDSN, are integrated observatories with tensor
strainmeters, tiltmeters, pore-pressure sensors, seismometers, and GPS receivers.

In addition to these observatories, the BDSN collects data from the
Parkfield-Hollister electro-magnetic experiment. This
experiment consists of
two sites with electric and magnetic field sensors and a third site
with electric field sensors.
Magnetic activity and
Shumann resonance parameters are calculated from these
data on a regular basis.

Plate Boundary Observatory Network

As part of Earthscope, the
Plate Boundary Observatory project is installing
borehole and laser strainmeters in the western
United States. Data from these
instruments and other evironmental sensors
will be available through the NCEDC as the stations are installed.